CN214231489U

CN214231489U - Femoral intramedullary nail distal sight

Info

Publication number: CN214231489U
Application number: CN202022781910.1U
Authority: CN
Inventors: 茶晓锋; 陈孝均; 陈巍; 吴东海; 刘意来
Original assignee: Luzhou Traditional Chinese Medicine Hospital (luzhou Integrated Traditional Chinese And Western Medicine Hospital Jiangyang District Traditional Chinese Medicine Hospital Of Luzhou); Affiliated Hospital of Traditional Chinese Medicine TCM of Southwest Medical University
Current assignee: Luzhou Traditional Chinese Medicine Hospital (luzhou Integrated Traditional Chinese And Western Medicine Hospital Jiangyang District Traditional Chinese Medicine Hospital Of Luzhou); Affiliated Hospital of Traditional Chinese Medicine TCM of Southwest Medical University
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-09-21
Anticipated expiration: 2030-11-26

Abstract

The utility model provides a distal end aimer of a femoral intramedullary nail, which relates to the technical field of orthopedic medical instruments. The utility model comprises an intramedullary nail and an aiming arm which are connected by a handle frame. Aiming adjustment groove, an adjustment cylinder is inserted into the aiming adjustment groove, a sleeve is inserted into the adjustment cylinder, a drill rod is inserted into the sleeve, the sleeve extends out of the adjustment cylinder, and the intramedullary nail is provided with a drill rod to pass through The center of the adjusting cylinder is provided with a limit disk and the end is connected with a locking nut, and the locking nut and the limit disk are respectively located on opposite sides of the aiming arm. The problem of inconvenient adjustment after the misalignment of the distal end aimer of the femoral intramedullary nail in the prior art is solved.

Description

Distal sighting device for femoral intramedullary nail

Technical Field

The utility model relates to the technical field of orthopedic medical instruments, in particular to a distal sight of a femoral intramedullary nail.

Background

The intramedullary nail is a classic scheme in a minimally invasive surgery for treating the lower limb backbone fracture, has the advantages of small incision, small influence on tissue blood supply, strong anti-rotation force, firm fixation and the like, and is widely applied to fracture of femoral and tibial bone shafts.

The distal aiming device of femoral intramedullary nail is an auxiliary device for improving the accurate locking of intramedullary nail. The conventional distal aiming device for the intramedullary nail of the lower limb is calibrated before implantation, but the locking nail cannot be locked after the intramedullary nail is inserted into a medullary cavity for various reasons (including the aspects of instrument and tool hardware and the aspects of operation and operation technology). The reason for analyzing the method mainly comprises the following steps: 1. the distal end of the main nail is not in the middle of the medullary cavity; 2. deformation of each part of the positioner or the combination part is not screwed tightly; 3. the scale selection of the scale of the locator is not in accordance with the main nail; 4. the main nail deforms and rotates after being inserted; 5. pushing the sleeve by local soft tissue muscles, and the like. And even if attention is paid to all details, especially to femoral intramedullary nails, there is finally a failure rate of 8% -29.1%.

In the operation process, the accurate projection of the sleeve and the drill rod on the cortical bone is determined by utilizing the C-arm machine for perspective, the freehand drilling and the distal locking are completed under the perspective, and the specific method comprises the steps of carrying out different body surface different-angle positioning under the side perspective, drilling with a Stewart pin, knocking in and finally locking. Once the distal locking nail of the intramedullary nail is out of alignment, the distal locking nail needs to be continuously readjusted under the perspective action until alignment, the efficiency of the whole process is low, the success rate is not easy to guarantee, the level requirement on an operator is high, the operation is completed under the perspective radiation in the whole process, and the health of the operator can be affected.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem among the prior art, the utility model provides a distal sight of femoral intramedullary nail has solved among the prior art the inconvenient problem of regulation after the distal sight of femoral intramedullary nail is out of alignment.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:

the distal sighting device for the femoral intramedullary nail comprises the intramedullary nail and a sighting arm which are connected through a handle frame, wherein the intramedullary nail is parallel to the sighting arm, a sighting adjusting groove is formed in the sighting arm, an adjusting cylinder is inserted in the sighting adjusting groove, a sleeve is inserted in the adjusting cylinder, a drill rod is inserted in the sleeve, the sleeve extends out of the adjusting cylinder, and a sighting hole for the drill rod to penetrate through is formed in the intramedullary nail; the middle part of adjusting a section of thick bamboo is provided with spacing dish and tip and is connected with lock nut, and lock nut and spacing dish are located the relative both sides of aiming arm respectively.

The utility model has the advantages that: after the intramedullary nail is inserted into a medullary cavity, under the action of X-ray fluoroscopy, an operator can judge whether to align on the same straight line with an aiming hole on the intramedullary nail through the central axis of the adjusting cylinder in the scheme, if the central axis is misaligned, the position of the adjusting cylinder can be adjusted in the aiming adjusting groove until the central axis is aligned, the position of the adjusting cylinder is fixed through locking of a locking nut after the central axis is aligned, then the sleeve is inserted into the adjusting cylinder, soft tissues are protected from being damaged by a drill rod in the soft tissues on the surface of a bone after the sleeve is inserted, and finally the drill rod is inserted into the bone for drilling.

Can lead sleeve and drilling rod through adjusting a section of thick bamboo, can guarantee that follow-up sleeve and drilling rod position can aim at after the position alignment that will adjust a section of thick bamboo before drilling, improve the convenience and the reliability of operation, and in the whole operation, only need be with the help of the perspective effect of X-ray in the alignment process of adjusting a section of thick bamboo, can significantly reduce the time that the art person is radiated by X-ray.

Drawings

Fig. 1 is a perspective view of a distal aimer of a femoral intramedullary nail.

Fig. 2 is a view of the aiming arm in direction a of fig. 1.

Fig. 3 is a cross-sectional view in the axial direction of the drill rod in fig. 1.

Wherein, 1, intramedullary nail; 11. a sighting hole; 2. a handle frame; 21. a C-shaped arm; 22. a connecting arm; 3. an aiming arm; 31. aiming at the adjusting slot; 32. connecting holes; 33. a limiting groove; 4. an adjusting cylinder; 41. a limiting disc; 5. a sleeve; 51. a handrail; 6. a drill stem; 7. locking the nut; 71. a via hole; 72. a threaded counter bore; 8. and connecting screws.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.

As shown in fig. 1 to 3, the distal sighting device for the femoral intramedullary nail comprises an intramedullary nail 1 and a sighting arm 3 which are connected through a handle frame 2, wherein the intramedullary nail 1 is parallel to the sighting arm 3, a sighting adjusting groove 31 is arranged on the sighting arm 3, an adjusting cylinder 4 is inserted in the sighting adjusting groove 31, a sleeve 5 is inserted in the adjusting cylinder 4, a drill rod 6 is inserted in the sleeve 5, the sleeve 5 extends out of the adjusting cylinder 4, and a sighting hole 11 for the drill rod 6 to pass through is arranged on the intramedullary nail 1; the middle part of adjusting barrel 4 is provided with spacing dish 41 and the tip is connected with lock nut 7, and lock nut 7 and spacing dish 41 are located the relative both sides of aiming arm 3 respectively.

The handle frame 2 comprises a C-shaped arm 21 and a connecting arm 22, one end of the connecting arm 22 and one end of the C-shaped arm 21 are integrally formed, the other end of the connecting arm 22 is adjustably connected with the aiming arm 3, and the other end of the C-shaped arm 21 is detachably connected with the intramedullary nail 1. The intramedullary nail 1 is screwed to the C-arm 21. The connecting arm 22 is used to connect with the aiming arm 3, and the C-shaped arm 21 is used to realize that the intramedullary nail 1 is positioned at the same side as the aiming arm 3, so that the aiming arm 3 can be aligned with the aiming hole 11 on the intramedullary nail 1.

As shown in fig. 2, a plurality of connecting holes 32 are arranged in parallel on the aiming arm 3, and the connecting holes 32 are used for connecting the connecting screws 8 and the handle frame 2. The connecting arm 22 is provided with a threaded hole, the two sides of the threaded hole are provided with protruding nails, the aiming arm 3 is provided with circular grooves for the two protruding nails to be embedded, the positioning is realized through the matching of the circular grooves and the protruding nails, and then the connecting screw 8 penetrates through the connecting hole 32 from the outer side of the aiming arm 3 and then is screwed with the threaded hole.

Aiming adjustment groove 31 is for running through the bar hole that sets up on aiming arm 3, and the bar hole extends along vertical direction, and this vertical direction is the vertical direction of this sight when using. The aiming adjusting groove 31 in the shape of the strip-shaped hole can fix any position of the adjusting cylinder 4 in the length direction of the strip-shaped hole, so that the accuracy of the aiming adjusting groove and the aiming hole 11 is improved.

A through hole for the sleeve 5 to pass through is arranged on the locking nut 7 in a penetrating mode, a threaded counter bore is machined in one end of the through hole, and an external thread in threaded connection with the threaded counter bore is arranged at one end of the adjusting cylinder 4. The end part of the adjusting cylinder 4 is always positioned in the locking nut 7 and can not extend to the upper end of the locking nut 7, so that the structure is more regular.

The aiming arm 3 is provided with a limiting groove 33 for embedding the limiting disc 41. After the locking nut 7 is locked, locking is realized by means of extrusion force among the locking nut 7, the aiming arm 3 and the limiting disc 41, the limiting groove 33 is arranged to prevent the limiting disc 41 from slipping after being loosened and loosened, and reliability is improved.

The end of the sleeve 5 remote from the intramedullary nail 1 is vertically fixed with a handrail 51. The armrest 51 is convenient for the operator to hold during the operation process, thereby improving the convenience of the operation.

During the use, before giving the bone drilling, first adjust a section of thick bamboo 4 and pass and aim behind the adjustment groove 31 with lock nut 7 threaded connection (not screw up) from aiming arm 3 towards one side of intramedullary nail 1, let the axial of adjusting a section of thick bamboo 4 align with aiming hole 11 under the X ray, screw up lock nut 7 and spacing dish 41 and can imbed spacing recess 33 after aligning, then pass adjusting a section of thick bamboo 4 and insert the skin soft tissue of incision department along the axial with sleeve 5, separate skin soft tissue through sleeve 5, prevent to damage skin soft tissue in the drilling process, pass sleeve 5 along the axial with drilling rod 6 at last and carry out the drilling.

Claims

1. A femoral intramedullary nail distal sight, characterized in that it comprises an intramedullary nail (1) and an aiming arm (3) connected by a handle frame (2), the intramedullary nail (1) being parallel to the Described aiming arm (3), described aiming arm (3) is provided with aiming adjustment groove (31), described aiming adjustment groove (31) is inserted with adjustment cylinder (4), in described adjustment cylinder (4) A sleeve (5) is inserted into the sleeve (5), a drill rod (6) is inserted into the sleeve (5), the sleeve (5) extends out of the adjustment cylinder (4), and the intramedullary nail ( 1) An aiming hole (11) for the drill rod (6) to pass through is provided on it; a limiting disk (41) is provided in the middle of the adjusting cylinder (4) and the end is connected with a locking nut (7), The locking nut (7) and the limiting disk (41) are respectively located on opposite sides of the aiming arm (3).

2. The femoral intramedullary nail distal end sight according to claim 1, wherein the handle frame (2) comprises a C-shaped arm (21) and a connecting arm (22), and the connecting arm (22) One end of the C-shaped arm (21) is integrally formed with one end of the C-shaped arm (21), the other end of the connecting arm (22) is adjustable and connected to the aiming arm (3), and the other end of the C-shaped arm (21) is connected to the aiming arm (3). The intramedullary nail (1) is detachably connected.

3. The femoral intramedullary nail distal end sight according to claim 1, wherein a plurality of connecting holes (32) are arranged side by side on the sighting arm (3), and the connecting holes (32) are used for For connecting screws (8) to pass through and connect with the handle frame (2).

4. The femoral intramedullary nail distal end sight according to claim 1, wherein the sighting adjustment groove (31) is a bar-shaped hole arranged through the sighting arm (3), and the bar The hole extends in the vertical direction.

5. The femoral intramedullary nail distal end sight according to claim 1, wherein a through hole (71) for the sleeve (5) to pass through is provided on the locking nut (7) One end of the through hole (71) is machined with a threaded counterbore (72), and one end of the adjusting cylinder (4) is provided with an external thread that is threadedly connected to the threaded counterbore (72).

6. The femoral intramedullary nail distal sight according to claim 1 or 5, characterized in that, the sighting arm (3) is provided with a limit groove ( 33).

7. The femoral intramedullary nail distal end sight according to claim 1 or 5, wherein a handrail (51) is vertically fixed at one end of the sleeve (5) away from the intramedullary nail (1).